贵州织金含稀土磷矿石的浮选富磷降镁实验

针对贵州织金含稀土磷矿石进行了选矿富磷降镁实验，原矿P₂O₅品位21.80%，MgO质量分数8.31%，采用一段反浮选流程，可获得精矿P₂O₅品位33.35%，MgO质量分数为1.36%，P₂O₅回收率86.53%；考察了选矿产品中稀土元素总量（∑REE）和重金属元素Pb、Cd的质量分数及走向，并分析精矿中∑REE、重金属元素Pb与P₂O₅品位之间的相关性。结果表明:重金属元素Pb和稀土元素在精矿中富集，而重金属元素Cd在尾矿中富集，为后续含稀土磷矿石的分离利用提供了依据。

Flotation of Phosphorus Enrichment and Magnesium Reduction of Phosphate Ore Bearing Rare Earth Elements in Zhijin of Guizhou

A reverse flotation was carried out of Zhijin phosphate ore bearing rare earths. The P₂O₅ grade and MgO content of raw ore were 21.80% and 8.31%， respectively. By using one-stage reverse flotation， the P₂O₅ grade and MgO content of concentrate were 33.35% and 1.36% respectively， and the recovery of P₂O₅ was 86.53%. The distribution of total rare earth elements content （∑REE） and heavy metals （Pb and Cd） in the flotation products was investigated， and the correlation between ∑REE， Pb and P₂O₅ grade was analyzed. The results show that Pb and rare earth elements are enriched in the concentrate， and Cd is enriched in the tailings. This provids a basis for the subsequent separation and utilization of phosphate ore bearing rare earths.